/Engine/Source/Runtime/CoreUObject/Public/UObject/UObjectArray.h
Return a reference to an element
a reference to the pointer to the element Thread safe, if it is valid now, it is valid forever. This might return nullptr, but by then, some other thread might have made it non-nullptr.
[FUObjectItem](API\Runtime\CoreUObject\UObject\FUObjectItem) const & operator[] ( int32 Index ) const